← Back to Patent Explorer
EP0103314A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Magnetic-tape cassette

Assignee: Koninklijke Philips NV
•
Filing: 1983-07-28
•
Granted: —
•
Expires: 2003-07-28
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract in a magnetic-tape cassette with a front aperture or recess at least one front cover is provided which can pivot under spring force from an open position to a closed position about a pivot which is perpendicular to the side walls of the housing of the cassette, which cover is latched in the closed position by means of at least one latching lever disposed near a side wall. The latching lever, which comprises two arms arranged in the form of an L can pivot into a latching position about a pivot which is arranged on said side wall parallel to the pivot of the front cover. The longer arm of the lever is elastically deflexible over at least a part of its length and at one end comprises a latching portion which during the pivotal movement of the lever is guided by guide means disposed near the latching portion. The shorter arm is connected at one end to the pivot of the latching lever.

Inventors

  • 👤 Joannes Henricus F.C. Sieben

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-04 16:08
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08735

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 322 words
A magnetic-tape cassette comprising: - a housing having first and second substantially parallel flat major walls, first and second substantially parallel side walls, a rear wall and a front with a front aperture or recess between the major walls, - two rotatable reel hubs arranged between the major walls; - a magnetic tape which is connected at its ends to the reel hubs and which has a portion which extends across said front aperture or recess in the housing to co-operate with parts of a magnetic-tape cassette apparatus; - at least one front cover which is pivotable from an open position to a closed position under spring force about a pivot which is perpedicular to the side walls of the housing, which front cover at least partly covers the front aperture or recess in the housing in the closed position; and - at least one latching lever which is pivotable about a pivot which is connected to the housing, which lever is situated near one of the side walls and pivots under spring force from an inoperative position to a latching position in which the latching lever latches the front cover in the closed position; characterised in that - the latching lever comprises two arms of different lengths arranged in the form of an L, the longer arm being elastically deflexible over at least a part of its length and the shorter arm being connected to the pivot of the latching lever at its end which is remote from the longer arm, - the pivot of the latching lever extends substantially parallel to the pivot of the front cover and is connected to said one of the side walls of the housing, and - the longer arm comprises a latching portion at its end which is remote from the shorter arm, which latching portion, during the pivotal movement of the latching lever, is guided by guide means disposed near the latching portion.
Claim 2
Dependent Claim 322 words
A magnetic-tape cassette comprising: - a housing having first and second substantially parallel flat major walls, first and second substantially parallel side walls, a rear wall and a front with a front aperture or recess between the major walls, - two rotatable reel hubs arranged between the major walls; - a magnetic tape which is connected at its ends to the reel hubs and which has a portion which extends across said front aperture or recess in the housing to co-operate with parts of a magnetic-tape cassette apparatus; - at least one front cover which is pivotable from an open position to a closed position under spring force about a pivot which is perpedicular to the side walls of the housing, which front cover at least partly covers the front aperture or recess in the housing in the closed position; and - at least one latching lever which is pivotable about a pivot which is connected to the housing, which lever is situated near one of the side walls and pivots under spring force from an inoperative position to a latching position in which the latching lever latches the front cover in the closed position; characterised in that - the latching lever comprises two arms of different lengths arranged in the form of an L, the longer arm being elastically deflexible over at least a part of its length and the shorter arm being connected to the pivot of the latching lever at its end which is remote from the longer arm, - the pivot of the latching lever extends substantially parallel to the pivot of the front cover and is connected to said one of the side walls of the housing, and - the longer arm comprises a latching portion at its end which is remote from the shorter arm, which latching portion, during the pivotal movement of the latching lever, is guided by guide means disposed near the latching portion.
Claim 3
Dependent Claim 34 words
A magnetic-tape cassette as claimed in Claim 1, characterised in that the latching portion is situated on the opposite side of the pivot of the front cover from the pivot of the latching lever.
Claim 4
Dependent Claim 44 words
A magnetic-tape cassette as claimed in Claim 2, characterised in that in the latching position the latching portion is situated adjacent the front of the housing and engages with a latching projection on the inner side of a front portion of the front cover.
Claim 5
Dependent Claim 38 words
A magnetic-tape cassette as claimed in any of the preceding claims, characterised in that the shorter arm of the latching lever comprises a fork-shaped end portion with resilient limbs which clamp around the pivot of the latching lever.
Claim 6
Dependent Claim 66 words
A magnetic-tape cassette as claimed in any of the preceding Claims, characterised in that adjacent the latching portion the longer arm of the latching lever has a slot which extends in the longitudinal direction of the longer arm, which slot receives a pin which extends parallel to the pivot of the latching lerver and is connected to said one of the side walls of the housing.
Claim 7
Dependent Claim 178 words
A magnetic-tape cassette as claimed in any of the preceding Claims, in which the front cover comprises side portions which, are arranged at the sides of the housing substantially parallel to the side walls thereof and are connected to the pivot of the front cores and which are disposed substantially in line with major portions of the side walls, which side walls comprise inner wall portions disposed on the inner sides of the side portions of the front cover, characterised in that at least said one of the side walls further comprises an outer wall portion which adjoins the major portion of that side wall, the pivot of the latching lever extends between the inner and outer wall portions of said one of the side walls, and the latching lever is arranged in a space which is bounded on one side by the inner wall portion of said one of the side walls and the other side by the adjacent side portion of the front cover and the outer wall portion of said one of the side walls.
Claim 8
Dependent Claim 65 words
A magnetic-tape cassette as claimed in Claim 6, characterised in that the shorter arm of the latching lever is situated between the inner wall portion and the outer wall portion of said one of the side walls and the latching lever comprises a projection which adjoins the shorter arm and which is disposed at the location of a recess in said outer side wall portion.
Claim 9
Dependent Claim 60 words
A magnetic-tape cassette as claimed in Claim 6, characterised in that in the space in which the latching lever is situated there is provided a spring for closing the front cover, the spring having a plurality of turns arranged around the pivot of the front cover and one end of the spring bearing against the pivot of the latching lever.
Claim 10
Dependent Claim 77 words
A magnetic-tape cassette as claimed in Claim 3 or any of the Claims 4 to 8 when read as appendant to Claim 3, characterised in that the magnetic-tape cassette comprises outer and inner front covers which are coupled to each other in such a way that when the outer cover is pivoted the inner cover moves with it, the outer cover carrying the latching projection and the inner cover being latched when the outer cover is latched.

References Cited (Backward Citations)

US2941741A Cited
GB1450744A Cited
FR2390801A1 Cited
EP0045084A2 Cited
EP0052479A2 Cited
EP0078696A1 Cited

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag